It sounds like the C50s will do for you with such a short leg. Might be worth asking if you could have one to try the action. They come with a nice large tank and a valve and all the pipework when you order a set. You can order then in North America from Altecare and I would give them a ring and chat about your requirement.

You can see the retracts in action on the Horten.

http://www.youtube.com/watch?v=MMWJiS-t4AU

This video will show how tough they are with a heavy landing with the Arado

http://www.youtube.com/watch?v=9NmhlhZgLjA


John